Ensure django dev rebuild on reqs+dockerfile modif
Ensure django dev rebuild on reqs+dockerfile modif

The ansible docker_image module is kind of dumb and doesnt smarter rebuild on
Dockerfile changes. On top of that, it doesnt detect when requirements.txt files
are changing. This commit takes a hash of both and mashes that together to
determine file changes.

freedomofpress/securethenews,freedomofpress/securethenews,freedomofpress/securethenews,freedomofpress/securethenews